cmd/link: TestRuntimeTypeAttr broken on ppc64, solaris

[josharian]

Introduced in https://golang.org/cl/106775.

cc @heschik

[gopherbot]

Change https://golang.org/cl/108575 mentions this issue: cmd/link: skip TestRuntimeTypeAttr to fix build

[gopherbot]

Change https://golang.org/cl/108955 mentions this issue: cmd/link: fix TestRuntimeTypeAttr on ppc64,solaris

[randall77]

I think I'm still running into this problem. When I do GOARCH=386 ./all.bash on Darwin, I get:

--- FAIL: TestRuntimeTypeAttr (0.43s)
    --- FAIL: TestRuntimeTypeAttr/flags=-ldflags=-linkmode=external (0.27s)
    	dwarf_test.go:856: could not run test program: exit status 2
FAIL
FAIL	cmd/link/internal/ld	17.431s

[randall77]

I've verified that this works on Darwin 1.11 but not 1.12. That's why the builder isn't failing, it is 1.11.
Presumably the host linker is barfing on something?

[heschik]

I see:

fatal error: runtime: bsdthread_register error

runtime stack:
runtime.throw(0x40a73f8, 0x21)
        /Users/heschi/go/src/runtime/panic.go:589 +0x5b fp=0xbffffb5c sp=0xbffffb48 pc=0x4023ccb
runtime.goenvs()
        /Users/heschi/go/src/runtime/os_darwin.go:129 +0x63 fp=0xbffffb70 sp=0xbffffb5c pc=0x4022043
runtime.schedinit()
        /Users/heschi/go/src/runtime/proc.go:505 +0xaf fp=0xbffffba0 sp=0xbffffb70 pc=0x402612f
runtime.rt0_go(0xbffffc48, 0xc, 0x4194306, 0x0, 0x41b598a, 0x57e5003b, 0x4000000, 0xbffffca0, 0xbffffc50, 0xbffffc18, ...)
        /Users/heschi/go/src/runtime/asm_386.s:268 +0x1bc fp=0xbffffba4 sp=0xbffffba0 pc=0x40452bc

when I try to run a hello world program built with -linkmode=external. I can skip the test, but it seems like this is worth its own bug, presuming that we want external linking to work on darwin-386.

[randall77]

I can get external linking to work (on 10.12).

$ GOARCH=386 go build -ldflags=-linkmode=external helloworld.go
$ ./helloworld
hello, world!
$ file helloworld
helloworld: Mach-O executable i386
$ otool -L helloworld
helloworld:
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1238.60.2)

[heschik]

Filed #25083, though I still don't know why it works for your helloworld but not the test.

[heschik]

I think Keith fixed this by switching to libc to create threads.